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1/* screen.c - Generic screen manipulation
2 * Copyright (c) 1995-1997 Stefan Jokisch
3 *
4 * This file is part of Frotz.
5 *
6 * Frotz is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * Frotz is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19 */
20
21#include "frotz.h"
22
23extern void set_header_extension (int, zword);
24
25extern int direct_call (zword);
26
27static struct {
28 enum story story_id;
29 int pic;
30 int pic1;
31 int pic2;
32} mapper[] = {
33 { ZORK_ZERO, 5, 497, 498 },
34 { ZORK_ZERO, 6, 501, 502 },
35 { ZORK_ZERO, 7, 499, 500 },
36 { ZORK_ZERO, 8, 503, 504 },
37 { ARTHUR, 54, 170, 171 },
38 { SHOGUN, 50, 61, 62 },
39 { UNKNOWN, 0, 0, 0 }
40};
41
42static int font_height = 1;
43static int font_width = 1;
44
45static bool input_redraw = FALSE;
46static bool more_prompts = TRUE;
47static bool discarding = FALSE;
48static bool cursor = TRUE;
49
50static int input_window = 0;
51
52static struct {
53 zword y_pos;
54 zword x_pos;
55 zword y_size;
56 zword x_size;
57 zword y_cursor;
58 zword x_cursor;
59 zword left;
60 zword right;
61 zword nl_routine;
62 zword nl_countdown;
63 zword style;
64 zword colour;
65 zword font;
66 zword font_size;
67 zword attribute;
68 zword line_count;
69} wp[8], *cwp;
70
71
72/*
73 * winarg0
74 *
75 * Return the window number in zargs[0]. In V6 only, -3 refers to the
76 * current window.
77 *
78 */
79
80static zword winarg0 (void)
81{
82
83 if (h_version == V6 && (short) zargs[0] == -3)
84 return cwin;
85
86 if (zargs[0] >= ((h_version == V6) ? 8 : 2))
87 runtime_error (ERR_ILL_WIN);
88
89 return zargs[0];
90
91}/* winarg0 */
92
93/*
94 * winarg2
95 *
96 * Return the (optional) window number in zargs[2]. -3 refers to the
97 * current window. This optional window number was only used by some
98 * V6 opcodes: set_cursor, set_margins, set_colour.
99 *
100 */
101
102static zword winarg2 (void)
103{
104
105 if (zargc < 3 || (short) zargs[2] == -3)
106 return cwin;
107
108 if (zargs[2] >= 8)
109 runtime_error (ERR_ILL_WIN);
110
111 return zargs[2];
112
113}/* winarg2 */
114
115/*
116 * update_cursor
117 *
118 * Move the hardware cursor to make it match the window properties.
119 *
120 */
121
122static void update_cursor (void)
123{
124
125 os_set_cursor (
126 cwp->y_pos + cwp->y_cursor - 1,
127 cwp->x_pos + cwp->x_cursor - 1);
128
129}/* update_cursor */
130
131/*
132 * reset_cursor
133 *
134 * Reset the cursor of a given window to its initial position.
135 *
136 */
137
138static void reset_cursor (zword win)
139{
140 int lines = 0;
141
142 if (h_version <= V4 && win == 0)
143 lines = wp[0].y_size / hi (wp[0].font_size) - 1;
144
145 wp[win].y_cursor = hi (wp[0].font_size) * lines + 1;
146 wp[win].x_cursor = wp[win].left + 1;
147
148 if (win == cwin)
149 update_cursor ();
150
151}/* reset_cursor */
152
153/*
154 * set_more_prompts
155 *
156 * Turn more prompts on/off.
157 *
158 */
159
160void set_more_prompts (bool flag)
161{
162
163 if (flag && !more_prompts)
164 cwp->line_count = 0;
165
166 more_prompts = flag;
167
168}/* set_more_prompts */
169
170/*
171 * units_left
172 *
173 * Return the #screen units from the cursor to the end of the line.
174 *
175 */
176
177static int units_left (void)
178{
179
180 return cwp->x_size - cwp->right - cwp->x_cursor + 1;
181
182}/* units_left */
183
184/*
185 * get_max_width
186 *
187 * Return maximum width of a line in the given window. This is used in
188 * connection with the extended output stream #3 call in V6.
189 *
190 */
191
192zword get_max_width (zword win)
193{
194
195 if (h_version == V6) {
196
197 if (win >= 8)
198 runtime_error (ERR_ILL_WIN);
199
200 return wp[win].x_size - wp[win].left - wp[win].right;
201
202 } else return 0xffff;
203
204}/* get_max_width */
205
206/*
207 * countdown
208 *
209 * Decrement the newline counter. Call the newline interrupt when the
210 * counter hits zero. This is a helper function for screen_new_line.
211 *
212 */
213
214static void countdown (void)
215{
216
217 if (cwp->nl_countdown != 0)
218 if (--cwp->nl_countdown == 0)
219 direct_call (cwp->nl_routine);
220
221}/* countdown */
222
223/*
224 * screen_new_line
225 *
226 * Print a newline to the screen.
227 *
228 */
229
230void screen_new_line (void)
231{
232
233 if (discarding) return;
234
235 /* Handle newline interrupts at the start (for most cases) */
236
237 if (h_interpreter_number != INTERP_MSDOS || story_id != ZORK_ZERO || h_release != 393)
238 countdown ();
239
240 /* Check whether the last input line gets destroyed */
241
242 if (input_window == cwin)
243 input_redraw = TRUE;
244
245 /* If the cursor has not reached the bottom line, then move it to
246 the next line; otherwise scroll the window or reset the cursor
247 to the top left. */
248
249 cwp->x_cursor = cwp->left + 1;
250
251 if (cwp->y_cursor + 2 * font_height - 1 > cwp->y_size)
252
253 if (enable_scrolling) {
254
255 zword y = cwp->y_pos;
256 zword x = cwp->x_pos;
257
258 os_scroll_area (y,
259 x,
260 y + cwp->y_size - 1,
261 x + cwp->x_size - 1,
262 font_height);
263
264 } else cwp->y_cursor = 1;
265
266 else cwp->y_cursor += font_height;
267
268 update_cursor ();
269
270 /* See if we need to print a more prompt (unless the game has set
271 the line counter to -999 in order to suppress more prompts). */
272
273 if (enable_scrolling && (short) cwp->line_count != -999) {
274
275 zword above = (cwp->y_cursor - 1) / font_height;
276 zword below = (cwp->y_size - cwp->y_cursor + 1) / font_height;
277
278 cwp->line_count++;
279
280 if ((short) cwp->line_count >= (short) above + below - 1) {
281
282 if (more_prompts)
283 os_more_prompt ();
284
285 cwp->line_count = f_setup.context_lines;
286
287 }
288
289 }
290
291 /* Handle newline interrupts at the end for Zork Zero under DOS */
292
293 if (h_interpreter_number == INTERP_MSDOS && story_id == ZORK_ZERO && h_release == 393)
294 countdown ();
295
296}/* screen_new_line */
297
298/*
299 * screen_char
300 *
301 * Display a single character on the screen.
302 *
303 */
304
305void screen_char (zchar c)
306{
307 int width;
308
309 if (discarding) return;
310
311 if (c == ZC_INDENT && cwp->x_cursor != cwp->left + 1)
312 c = ' ';
313
314 if (units_left () < (width = os_char_width (c))) {
315
316 if (!enable_wrapping)
317 { cwp->x_cursor = cwp->x_size - cwp->right; return; }
318
319 screen_new_line ();
320
321 }
322
323 os_display_char (c); cwp->x_cursor += width;
324
325}/* screen_char */
326
327/*
328 * screen_word
329 *
330 * Display a string of characters on the screen. If the word doesn't fit
331 * then use wrapping or clipping depending on the current setting of the
332 * enable_wrapping flag.
333 *
334 */
335
336void screen_word (const zchar *s)
337{
338 int width;
339
340 if (discarding) return;
341
342 if (*s == ZC_INDENT && cwp->x_cursor != cwp->left + 1)
343 screen_char (*s++);
344
345 if (units_left () < (width = os_string_width (s))) {
346
347 if (!enable_wrapping) {
348
349 zchar c;
350
351 while ((c = *s++) != 0)
352
353 if (c == ZC_NEW_FONT || c == ZC_NEW_STYLE) {
354
355 int arg = (int) *s++;
356
357 if (c == ZC_NEW_FONT)
358 os_set_font (arg);
359 if (c == ZC_NEW_STYLE)
360 os_set_text_style (arg);
361
362 } else screen_char (c);
363
364 return;
365
366 }
367
368 if (*s == ' ' || *s == ZC_INDENT || *s == ZC_GAP)
369 width = os_string_width (++s);
370
371#ifdef AMIGA
372 if (cwin == 0) Justifiable ();
373#endif
374
375 screen_new_line ();
376
377 }
378
379 os_display_string (s); cwp->x_cursor += width;
380
381}/* screen_word */
382
383/*
384 * screen_write_input
385 *
386 * Display an input line on the screen. This is required during playback.
387 *
388 */
389
390void screen_write_input (const zchar *buf, zchar key)
391{
392 int width;
393
394 if (units_left () < (width = os_string_width (buf)))
395 screen_new_line ();
396
397 os_display_string (buf); cwp->x_cursor += width;
398
399 if (key == ZC_RETURN)
400 screen_new_line ();
401
402}/* screen_write_input */
403
404/*
405 * screen_erase_input
406 *
407 * Remove an input line that has already been printed from the screen
408 * as if it was deleted by the player. This could be necessary during
409 * playback.
410 *
411 */
412
413void screen_erase_input (const zchar *buf)
414{
415
416 if (buf[0] != 0) {
417
418 int width = os_string_width (buf);
419
420 zword y;
421 zword x;
422
423 cwp->x_cursor -= width;
424
425 y = cwp->y_pos + cwp->y_cursor - 1;
426 x = cwp->x_pos + cwp->x_cursor - 1;
427
428 os_erase_area (y, x, y + font_height - 1, x + width - 1);
429 os_set_cursor (y, x);
430
431 }
432
433}/* screen_erase_input */
434
435/*
436 * console_read_input
437 *
438 * Read an input line from the keyboard and return the terminating key.
439 *
440 */
441
442zchar console_read_input (int max, zchar *buf, zword timeout, bool continued)
443{
444 zchar key;
445 int i;
446
447 /* Make sure there is some space for input */
448
449 if (cwin == 0 && units_left () + os_string_width (buf) < 10 * font_width)
450 screen_new_line ();
451
452 /* Make sure the input line is visible */
453
454 if (continued && input_redraw)
455 screen_write_input (buf, -1);
456
457 input_window = cwin;
458 input_redraw = FALSE;
459
460 /* Get input line from IO interface */
461
462 cwp->x_cursor -= os_string_width (buf);
463 key = os_read_line (max, buf, timeout, units_left (), continued);
464 cwp->x_cursor += os_string_width (buf);
465
466 if (key != ZC_TIME_OUT)
467 for (i = 0; i < 8; i++)
468 wp[i].line_count = 0;
469
470 /* Add a newline if the input was terminated normally */
471
472 if (key == ZC_RETURN)
473 screen_new_line ();
474
475 return key;
476
477}/* console_read_input */
478
479/*
480 * console_read_key
481 *
482 * Read a single keystroke and return it.
483 *
484 */
485
486zchar console_read_key (zword timeout)
487{
488 zchar key;
489 int i;
490
491 key = os_read_key (timeout, cursor);
492
493 if (key != ZC_TIME_OUT)
494 for (i = 0; i < 8; i++)
495 wp[i].line_count = 0;
496
497 return key;
498
499}/* console_read_key */
500
501/*
502 * update_attributes
503 *
504 * Set the three enable_*** variables to make them match the attributes
505 * of the current window.
506 *
507 */
508
509static void update_attributes (void)
510{
511 zword attr = cwp->attribute;
512
513 enable_wrapping = attr & 1;
514 enable_scrolling = attr & 2;
515 enable_scripting = attr & 4;
516 enable_buffering = attr & 8;
517
518 /* Some story files forget to select wrapping for printing hints */
519
520 if (story_id == ZORK_ZERO && h_release == 366)
521 if (cwin == 0)
522 enable_wrapping = TRUE;
523 if (story_id == SHOGUN && h_release <= 295)
524 if (cwin == 0)
525 enable_wrapping = TRUE;
526
527}/* update_attributes */
528
529/*
530 * refresh_text_style
531 *
532 * Set the right text style. This can be necessary when the fixed font
533 * flag is changed, or when a new window is selected, or when the game
534 * uses the set_text_style opcode.
535 *
536 */
537
538void refresh_text_style (void)
539{
540 zword style;
541
542 if (h_version != V6) {
543
544 style = wp[0].style;
545
546 if (cwin != 0 || h_flags & FIXED_FONT_FLAG)
547 style |= FIXED_WIDTH_STYLE;
548
549 } else style = cwp->style;
550
551 if (!ostream_memory && ostream_screen && enable_buffering) {
552
553 print_char (ZC_NEW_STYLE);
554 print_char (style);
555
556 } else os_set_text_style (style);
557
558}/* refresh_text_style */
559
560/*
561 * set_window
562 *
563 * Set the current window. In V6 every window has its own set of window
564 * properties such as colours, text style, cursor position and size.
565 *
566 */
567
568static void set_window (zword win)
569{
570
571 flush_buffer ();
572
573 cwin = win; cwp = wp + win;
574
575 update_attributes ();
576
577 if (h_version == V6) {
578
579 os_set_colour (lo (cwp->colour), hi (cwp->colour));
580
581 if (os_font_data (cwp->font, &font_height, &font_width))
582 os_set_font (cwp->font);
583
584 os_set_text_style (cwp->style);
585
586 } else refresh_text_style ();
587
588 if (h_version != V6 && win != 0) {
589 wp[win].y_cursor = 1;
590 wp[win].x_cursor = 1;
591 }
592
593 update_cursor ();
594
595}/* set_window */
596
597/*
598 * erase_window
599 *
600 * Erase a window to background colour.
601 *
602 */
603
604void erase_window (zword win)
605{
606 zword y = wp[win].y_pos;
607 zword x = wp[win].x_pos;
608
609 if (h_version == V6 && win != cwin && h_interpreter_number != INTERP_AMIGA)
610 os_set_colour (lo (wp[win].colour), hi (wp[win].colour));
611
612 os_erase_area (y,
613 x,
614 y + wp[win].y_size - 1,
615 x + wp[win].x_size - 1);
616
617 if (h_version == V6 && win != cwin && h_interpreter_number != INTERP_AMIGA)
618 os_set_colour (lo (cwp->colour), hi (cwp->colour));
619
620 reset_cursor (win);
621
622 wp[win].line_count = 0;
623
624}/* erase_window */
625
626/*
627 * split_window
628 *
629 * Divide the screen into upper (1) and lower (0) windows. In V3 the upper
630 * window appears below the status line.
631 *
632 */
633
634void split_window (zword height)
635{
636 zword stat_height = 0;
637
638 flush_buffer ();
639
640 /* Calculate height of status line and upper window */
641
642 if (h_version != V6)
643 height *= hi (wp[1].font_size);
644
645 if (h_version <= V3)
646 stat_height = hi (wp[7].font_size);
647
648 /* Cursor of upper window mustn't be swallowed by the lower window */
649
650 wp[1].y_cursor += wp[1].y_pos - 1 - stat_height;
651
652 wp[1].y_pos = 1 + stat_height;
653 wp[1].y_size = height;
654
655 if ((short) wp[1].y_cursor > (short) wp[1].y_size)
656 reset_cursor (1);
657
658 /* Cursor of lower window mustn't be swallowed by the upper window */
659
660 wp[0].y_cursor += wp[0].y_pos - 1 - stat_height - height;
661
662 wp[0].y_pos = 1 + stat_height + height;
663 wp[0].y_size = h_screen_height - stat_height - height;
664
665 if ((short) wp[0].y_cursor < 1)
666 reset_cursor (0);
667
668 /* Erase the upper window in V3 only */
669
670 if (h_version == V3 && height != 0)
671 erase_window (1);
672
673}/* split_window */
674
675/*
676 * erase_screen
677 *
678 * Erase the entire screen to background colour.
679 *
680 */
681
682static void erase_screen (zword win)
683{
684 int i;
685
686 os_erase_area (1, 1, h_screen_height, h_screen_width);
687
688 if ((short) win == -1) {
689 split_window (0);
690 set_window (0);
691 reset_cursor (0);
692 }
693
694 for (i = 0; i < 8; i++)
695 wp[i].line_count = 0;
696
697}/* erase_screen */
698
699/* #ifdef AMIGA */
700
701/*
702 * resize_screen
703 *
704 * Try to adapt the window properties to a new screen size.
705 *
706 */
707
708void resize_screen (void)
709{
710
711 if (h_version != V6) {
712
713 wp[0].x_size = h_screen_width;
714 wp[1].x_size = h_screen_width;
715 wp[7].x_size = h_screen_width;
716
717 wp[0].y_size = h_screen_height - wp[1].y_size - wp[7].y_size;
718
719 }
720
721}/* resize_screen */
722
723/* #endif */
724
725/*
726 * restart_screen
727 *
728 * Prepare the screen for a new game.
729 *
730 */
731
732void restart_screen (void)
733{
734
735 /* Use default settings */
736
737 os_set_colour (h_default_foreground, h_default_background);
738
739 if (os_font_data (TEXT_FONT, &font_height, &font_width))
740 os_set_font (TEXT_FONT);
741
742 os_set_text_style (0);
743
744 cursor = TRUE;
745
746 /* Initialise window properties */
747
748 mwin = 1;
749
750 for (cwp = wp; cwp < wp + 8; cwp++) {
751 cwp->y_pos = 1;
752 cwp->x_pos = 1;
753 cwp->y_size = 0;
754 cwp->x_size = 0;
755 cwp->y_cursor = 1;
756 cwp->x_cursor = 1;
757 cwp->left = 0;
758 cwp->right = 0;
759 cwp->nl_routine = 0;
760 cwp->nl_countdown = 0;
761 cwp->style = 0;
762 cwp->colour = (h_default_background << 8) | h_default_foreground;
763 cwp->font = TEXT_FONT;
764 cwp->font_size = (font_height << 8) | font_width;
765 cwp->attribute = 8;
766 }
767
768 /* Prepare lower/upper windows and status line */
769
770 wp[0].attribute = 15;
771
772 wp[0].left = f_setup.left_margin;
773 wp[0].right = f_setup.right_margin;
774
775 wp[0].x_size = h_screen_width;
776 wp[1].x_size = h_screen_width;
777
778 if (h_version <= V3)
779 wp[7].x_size = h_screen_width;
780
781 os_restart_game (RESTART_WPROP_SET);
782
783 /* Clear the screen, unsplit it and select window 0 */
784
785 erase_screen ((zword) (-1));
786
787}/* restart_screen */
788
789/*
790 * validate_click
791 *
792 * Return false if the last mouse click occured outside the current
793 * mouse window; otherwise write the mouse arrow coordinates to the
794 * memory of the header extension table and return true.
795 *
796 */
797
798bool validate_click (void)
799{
800
801 if (mwin >= 0) {
802
803 if (mouse_y < wp[mwin].y_pos || mouse_y >= wp[mwin].y_pos + wp[mwin].y_size)
804 return FALSE;
805 if (mouse_x < wp[mwin].x_pos || mouse_x >= wp[mwin].x_pos + wp[mwin].x_size)
806 return FALSE;
807
808 hx_mouse_y = mouse_y - wp[mwin].y_pos + 1;
809 hx_mouse_x = mouse_x - wp[mwin].x_pos + 1;
810
811 } else {
812
813 if (mouse_y < 1 || mouse_y > h_screen_height)
814 return FALSE;
815 if (mouse_x < 1 || mouse_x > h_screen_width)
816 return FALSE;
817
818 hx_mouse_y = mouse_y;
819 hx_mouse_x = mouse_x;
820
821 }
822
823 if (h_version != V6) {
824 hx_mouse_y = (hx_mouse_y - 1) / h_font_height + 1;
825 hx_mouse_x = (hx_mouse_x - 1) / h_font_width + 1;
826 }
827
828 set_header_extension (HX_MOUSE_Y, hx_mouse_y);
829 set_header_extension (HX_MOUSE_X, hx_mouse_x);
830
831 return TRUE;
832
833}/* validate_click */
834
835/*
836 * screen_mssg_on
837 *
838 * Start printing a so-called debugging message. The contents of the
839 * message are passed to the message stream, a Frotz specific output
840 * stream with maximum priority.
841 *
842 */
843
844void screen_mssg_on (void)
845{
846
847 if (cwin == 0) { /* messages in window 0 only */
848
849 os_set_text_style (0);
850
851 if (cwp->x_cursor != cwp->left + 1)
852 screen_new_line ();
853
854 screen_char (ZC_INDENT);
855
856 } else discarding = TRUE; /* discard messages in other windows */
857
858}/* screen_mssg_on */
859
860/*
861 * screen_mssg_off
862 *
863 * Stop printing a "debugging" message.
864 *
865 */
866
867void screen_mssg_off (void)
868{
869
870 if (cwin == 0) { /* messages in window 0 only */
871
872 screen_new_line ();
873
874 refresh_text_style ();
875
876 } else discarding = FALSE; /* message has been discarded */
877
878}/* screen_mssg_off */
879
880/*
881 * z_buffer_mode, turn text buffering on/off.
882 *
883 * zargs[0] = new text buffering flag (0 or 1)
884 *
885 */
886
887void z_buffer_mode (void)
888{
889
890 /* Infocom's V6 games rarely use the buffer_mode opcode. If they do
891 then only to print text immediately, without any delay. This was
892 used to give the player some sign of life while the game was
893 spending much time on parsing a complicated input line. (To turn
894 off word wrapping, V6 games use the window_style opcode instead.)
895 Today we can afford to ignore buffer_mode in V6. */
896
897 if (h_version != V6) {
898
899 flush_buffer ();
900
901 wp[0].attribute &= ~8;
902
903 if (zargs[0] != 0)
904 wp[0].attribute |= 8;
905
906 update_attributes ();
907
908 }
909
910}/* z_buffer_mode */
911
912/*
913 * z_draw_picture, draw a picture.
914 *
915 * zargs[0] = number of picture to draw
916 * zargs[1] = y-coordinate of top left corner
917 * zargs[2] = x-coordinate of top left corner
918 *
919 */
920
921void z_draw_picture (void)
922{
923 zword pic = zargs[0];
924
925 zword y = zargs[1];
926 zword x = zargs[2];
927
928 int i;
929
930 flush_buffer ();
931
932 if (y == 0) /* use cursor line if y-coordinate is 0 */
933 y = cwp->y_cursor;
934 if (x == 0) /* use cursor column if x-coordinate is 0 */
935 x = cwp->x_cursor;
936
937 y += cwp->y_pos - 1;
938 x += cwp->x_pos - 1;
939
940 /* The following is necessary to make Amiga and Macintosh story
941 files work with MCGA graphics files. Some screen-filling
942 pictures of the original Amiga release like the borders of
943 Zork Zero were split into several MCGA pictures (left, right
944 and top borders). We pretend this has not happened. */
945
946 for (i = 0; mapper[i].story_id != UNKNOWN; i++)
947
948 if (story_id == mapper[i].story_id && pic == mapper[i].pic) {
949
950 int height1, width1;
951 int height2, width2;
952
953 int delta = 0;
954
955 os_picture_data (pic, &height1, &width1);
956 os_picture_data (mapper[i].pic2, &height2, &width2);
957
958 if (story_id == ARTHUR && pic == 54)
959 delta = h_screen_width / 160;
960
961 os_draw_picture (mapper[i].pic1, y + height1, x + delta);
962 os_draw_picture (mapper[i].pic2, y + height1, x + width1 - width2 - delta);
963
964 }
965
966 os_draw_picture (pic, y, x);
967
968 if (story_id == SHOGUN)
969
970 if (pic == 3) {
971
972 int height, width;
973
974 os_picture_data (59, &height, &width);
975 os_draw_picture (59, y, h_screen_width - width + 1);
976
977 }
978
979}/* z_draw_picture */
980
981/*
982 * z_erase_line, erase the line starting at the cursor position.
983 *
984 * zargs[0] = 1 + #units to erase (1 clears to the end of the line)
985 *
986 */
987
988void z_erase_line (void)
989{
990 zword pixels = zargs[0];
991 zword y, x;
992
993 flush_buffer ();
994
995 /* Clipping at the right margin of the current window */
996
997 if (--pixels == 0 || pixels > units_left ())
998 pixels = units_left ();
999
1000 /* Erase from cursor position */
1001
1002 y = cwp->y_pos + cwp->y_cursor - 1;
1003 x = cwp->x_pos + cwp->x_cursor - 1;
1004
1005 os_erase_area (y, x, y + font_height - 1, x + pixels - 1);
1006
1007}/* z_erase_line */
1008
1009/*
1010 * z_erase_picture, erase a picture with background colour.
1011 *
1012 * zargs[0] = number of picture to erase
1013 * zargs[1] = y-coordinate of top left corner (optional)
1014 * zargs[2] = x-coordinate of top left corner (optional)
1015 *
1016 */
1017
1018void z_erase_picture (void)
1019{
1020 int height, width;
1021
1022 zword y = zargs[1];
1023 zword x = zargs[2];
1024
1025 flush_buffer ();
1026
1027 if (y == 0) /* use cursor line if y-coordinate is 0 */
1028 y = cwp->y_cursor;
1029 if (x == 0) /* use cursor column if x-coordinate is 0 */
1030 x = cwp->x_cursor;
1031
1032 os_picture_data (zargs[0], &height, &width);
1033
1034 y += cwp->y_pos - 1;
1035 x += cwp->x_pos - 1;
1036
1037 os_erase_area (y, x, y + height - 1, x + width - 1);
1038
1039}/* z_erase_picture */
1040
1041/*
1042 * z_erase_window, erase a window or the screen to background colour.
1043 *
1044 * zargs[0] = window (-3 current, -2 screen, -1 screen & unsplit)
1045 *
1046 */
1047
1048void z_erase_window (void)
1049{
1050
1051 flush_buffer ();
1052
1053 if ((short) zargs[0] == -1 || (short) zargs[0] == -2)
1054 erase_screen (zargs[0]);
1055 else
1056 erase_window (winarg0 ());
1057
1058}/* z_erase_window */
1059
1060/*
1061 * z_get_cursor, write the cursor coordinates into a table.
1062 *
1063 * zargs[0] = address to write information to
1064 *
1065 */
1066
1067void z_get_cursor (void)
1068{
1069 zword y, x;
1070
1071 flush_buffer ();
1072
1073 y = cwp->y_cursor;
1074 x = cwp->x_cursor;
1075
1076 if (h_version != V6) { /* convert to grid positions */
1077 y = (y - 1) / h_font_height + 1;
1078 x = (x - 1) / h_font_width + 1;
1079 }
1080
1081 storew ((zword) (zargs[0] + 0), y);
1082 storew ((zword) (zargs[0] + 2), x);
1083
1084}/* z_get_cursor */
1085
1086/*
1087 * z_get_wind_prop, store the value of a window property.
1088 *
1089 * zargs[0] = window (-3 is the current one)
1090 * zargs[1] = number of window property to be stored
1091 *
1092 */
1093
1094void z_get_wind_prop (void)
1095{
1096
1097 flush_buffer ();
1098
1099 if (zargs[1] >= 16)
1100 runtime_error (ERR_ILL_WIN_PROP);
1101
1102 store (((zword *) (wp + winarg0 ())) [zargs[1]]);
1103
1104}/* z_get_wind_prop */
1105
1106/*
1107 * z_mouse_window, select a window as mouse window.
1108 *
1109 * zargs[0] = window number (-3 is the current) or -1 for the screen
1110 *
1111 */
1112
1113void z_mouse_window (void)
1114{
1115
1116 mwin = ((short) zargs[0] == -1) ? -1 : winarg0 ();
1117
1118}/* z_mouse_window */
1119
1120/*
1121 * z_move_window, place a window on the screen.
1122 *
1123 * zargs[0] = window (-3 is the current one)
1124 * zargs[1] = y-coordinate
1125 * zargs[2] = x-coordinate
1126 *
1127 */
1128
1129void z_move_window (void)
1130{
1131 zword win = winarg0 ();
1132
1133 flush_buffer ();
1134
1135 wp[win].y_pos = zargs[1];
1136 wp[win].x_pos = zargs[2];
1137
1138 if (win == cwin)
1139 update_cursor ();
1140
1141}/* z_move_window */
1142
1143/*
1144 * z_picture_data, get information on a picture or the graphics file.
1145 *
1146 * zargs[0] = number of picture or 0 for the graphics file
1147 * zargs[1] = address to write information to
1148 *
1149 */
1150
1151void z_picture_data (void)
1152{
1153 zword pic = zargs[0];
1154 zword table = zargs[1];
1155
1156 int height, width;
1157 int i;
1158
1159 bool avail = os_picture_data (pic, &height, &width);
1160
1161 for (i = 0; mapper[i].story_id != UNKNOWN; i++)
1162
1163 if (story_id == mapper[i].story_id) {
1164
1165 if (pic == mapper[i].pic) {
1166
1167 int height2, width2;
1168
1169 avail &= os_picture_data (mapper[i].pic1, &height2, &width2);
1170 avail &= os_picture_data (mapper[i].pic2, &height2, &width2);
1171
1172 height += height2;
1173
1174 } else if (pic == mapper[i].pic1 || pic == mapper[i].pic2)
1175
1176 avail = FALSE;
1177 }
1178
1179 storew ((zword) (table + 0), (zword) (height));
1180 storew ((zword) (table + 2), (zword) (width));
1181
1182 branch (avail);
1183
1184}/* z_picture_data */
1185
1186/*
1187 * z_picture_table, prepare a group of pictures for faster display.
1188 *
1189 * zargs[0] = address of table holding the picture numbers
1190 *
1191 */
1192
1193void z_picture_table (void)
1194{
1195
1196 /* This opcode is used by Shogun and Zork Zero when the player
1197 encounters built-in games such as Peggleboz. Nowadays it is
1198 not very helpful to hold the picture data in memory because
1199 even a small disk cache avoids re-loading of data. */
1200
1201}/* z_picture_table */
1202
1203/*
1204 * z_print_table, print ASCII text in a rectangular area.
1205 *
1206 * zargs[0] = address of text to be printed
1207 * zargs[1] = width of rectangular area
1208 * zargs[2] = height of rectangular area (optional)
1209 * zargs[3] = number of char's to skip between lines (optional)
1210 *
1211 */
1212
1213void z_print_table (void)
1214{
1215 zword addr = zargs[0];
1216 zword x;
1217 int i, j;
1218
1219 flush_buffer ();
1220
1221 /* Supply default arguments */
1222
1223 if (zargc < 3)
1224 zargs[2] = 1;
1225 if (zargc < 4)
1226 zargs[3] = 0;
1227
1228 /* Write text in width x height rectangle */
1229
1230 x = cwp->x_cursor;
1231
1232 for (i = 0; i < zargs[2]; i++) {
1233
1234 if (i != 0) {
1235
1236 flush_buffer ();
1237
1238 cwp->y_cursor += font_height;
1239 cwp->x_cursor = x;
1240
1241 update_cursor ();
1242
1243 }
1244
1245 for (j = 0; j < zargs[1]; j++) {
1246
1247 zbyte c;
1248
1249 LOW_BYTE (addr, c)
1250 addr++;
1251
1252 print_char (c);
1253
1254 }
1255
1256 addr += zargs[3];
1257
1258 }
1259
1260}/* z_print_table */
1261
1262/*
1263 * z_put_wind_prop, set the value of a window property.
1264 *
1265 * zargs[0] = window (-3 is the current one)
1266 * zargs[1] = number of window property to set
1267 * zargs[2] = value to set window property to
1268 *
1269 */
1270
1271void z_put_wind_prop (void)
1272{
1273
1274 flush_buffer ();
1275
1276 if (zargs[1] >= 16)
1277 runtime_error (ERR_ILL_WIN_PROP);
1278
1279 ((zword *) (wp + winarg0 ())) [zargs[1]] = zargs[2];
1280
1281}/* z_put_wind_prop */
1282
1283/*
1284 * z_scroll_window, scroll a window up or down.
1285 *
1286 * zargs[0] = window (-3 is the current one)
1287 * zargs[1] = #screen units to scroll up (positive) or down (negative)
1288 *
1289 */
1290
1291void z_scroll_window (void)
1292{
1293 zword win = winarg0 ();
1294 zword y, x;
1295
1296 flush_buffer ();
1297
1298 /* Use the correct set of colours when scrolling the window */
1299
1300 if (win != cwin && h_interpreter_number != INTERP_AMIGA)
1301 os_set_colour (lo (wp[win].colour), hi (wp[win].colour));
1302
1303 y = wp[win].y_pos;
1304 x = wp[win].x_pos;
1305
1306 os_scroll_area (y,
1307 x,
1308 y + wp[win].y_size - 1,
1309 x + wp[win].x_size - 1,
1310 (short) zargs[1]);
1311
1312 if (win != cwin && h_interpreter_number != INTERP_AMIGA)
1313 os_set_colour (lo (cwp->colour), hi (cwp->colour));
1314
1315}/* z_scroll_window */
1316
1317/*
1318 * z_set_colour, set the foreground and background colours.
1319 *
1320 * zargs[0] = foreground colour
1321 * zargs[1] = background colour
1322 * zargs[2] = window (-3 is the current one, optional)
1323 *
1324 */
1325
1326void z_set_colour (void)
1327{
1328 zword win = (h_version == V6) ? winarg2 () : 0;
1329
1330 zword fg = zargs[0];
1331 zword bg = zargs[1];
1332
1333 flush_buffer ();
1334
1335 if ((short) fg == -1) /* colour -1 is the colour at the cursor */
1336 fg = os_peek_colour ();
1337 if ((short) bg == -1)
1338 bg = os_peek_colour ();
1339
1340 if (fg == 0) /* colour 0 means keep current colour */
1341 fg = lo (wp[win].colour);
1342 if (bg == 0)
1343 bg = hi (wp[win].colour);
1344
1345 if (fg == 1) /* colour 1 is the system default colour */
1346 fg = h_default_foreground;
1347 if (bg == 1)
1348 bg = h_default_background;
1349
1350 if (h_version == V6 && h_interpreter_number == INTERP_AMIGA)
1351
1352 /* Changing colours of window 0 affects the entire screen */
1353
1354 if (win == 0) {
1355
1356 int i;
1357
1358 for (i = 1; i < 8; i++) {
1359
1360 zword bg2 = hi (wp[i].colour);
1361 zword fg2 = lo (wp[i].colour);
1362
1363 if (bg2 < 16)
1364 bg2 = (bg2 == lo (wp[0].colour)) ? fg : bg;
1365 if (fg2 < 16)
1366 fg2 = (fg2 == lo (wp[0].colour)) ? fg : bg;
1367
1368 wp[i].colour = (bg2 << 8) | fg2;
1369
1370 }
1371
1372 }
1373
1374 wp[win].colour = (bg << 8) | fg;
1375
1376 if (win == cwin || h_version != V6)
1377 os_set_colour (fg, bg);
1378
1379}/* z_set_colour */
1380
1381/*
1382 * z_set_font, set the font for text output and store the previous font.
1383 *
1384 * zargs[0] = number of font or 0 to keep current font
1385 *
1386 */
1387
1388void z_set_font (void)
1389{
1390 zword win = (h_version == V6) ? cwin : 0;
1391 zword font = zargs[0];
1392
1393 if (font != 0) {
1394
1395 if (os_font_data (font, &font_height, &font_width)) {
1396
1397 store (wp[win].font);
1398
1399 wp[win].font = font;
1400 wp[win].font_size = (font_height << 8) | font_width;
1401
1402 if (!ostream_memory && ostream_screen && enable_buffering) {
1403
1404 print_char (ZC_NEW_FONT);
1405 print_char (font);
1406
1407 } else os_set_font (font);
1408
1409 } else store (0);
1410
1411 } else store (wp[win].font);
1412
1413}/* z_set_font */
1414
1415/*
1416 * z_set_cursor, set the cursor position or turn the cursor on/off.
1417 *
1418 * zargs[0] = y-coordinate or -2/-1 for cursor on/off
1419 * zargs[1] = x-coordinate
1420 * zargs[2] = window (-3 is the current one, optional)
1421 *
1422 */
1423
1424void z_set_cursor (void)
1425{
1426 zword win = (h_version == V6) ? winarg2 () : 1;
1427
1428 zword y = zargs[0];
1429 zword x = zargs[1];
1430
1431 flush_buffer ();
1432
1433 /* Supply default arguments */
1434
1435 if (zargc < 3)
1436 zargs[2] = -3;
1437
1438 /* Handle cursor on/off */
1439
1440 if ((short) y < 0) {
1441
1442 if ((short) y == -2)
1443 cursor = TRUE;
1444 if ((short) y == -1)
1445 cursor = FALSE;
1446
1447 return;
1448
1449 }
1450
1451 /* Convert grid positions to screen units if this is not V6 */
1452
1453 if (h_version != V6) {
1454
1455 if (cwin == 0)
1456 return;
1457
1458 y = (y - 1) * h_font_height + 1;
1459 x = (x - 1) * h_font_width + 1;
1460
1461 }
1462
1463 /* Protect the margins */
1464
1465 if (y == 0) /* use cursor line if y-coordinate is 0 */
1466 y = wp[win].y_cursor;
1467 if (x == 0) /* use cursor column if x-coordinate is 0 */
1468 x = wp[win].x_cursor;
1469 if (x <= wp[win].left || x > wp[win].x_size - wp[win].right)
1470 x = wp[win].left + 1;
1471
1472 /* Move the cursor */
1473
1474 wp[win].y_cursor = y;
1475 wp[win].x_cursor = x;
1476
1477 if (win == cwin)
1478 update_cursor ();
1479
1480}/* z_set_cursor */
1481
1482/*
1483 * z_set_margins, set the left and right margins of a window.
1484 *
1485 * zargs[0] = left margin in pixels
1486 * zargs[1] = right margin in pixels
1487 * zargs[2] = window (-3 is the current one, optional)
1488 *
1489 */
1490
1491void z_set_margins (void)
1492{
1493 zword win = winarg2 ();
1494
1495 flush_buffer ();
1496
1497 wp[win].left = zargs[0];
1498 wp[win].right = zargs[1];
1499
1500 /* Protect the margins */
1501
1502 if (wp[win].x_cursor <= zargs[0] || wp[win].x_cursor > wp[win].x_size - zargs[1]) {
1503
1504 wp[win].x_cursor = zargs[0] + 1;
1505
1506 if (win == cwin)
1507 update_cursor ();
1508
1509 }
1510
1511}/* z_set_margins */
1512
1513/*
1514 * z_set_text_style, set the style for text output.
1515 *
1516 * zargs[0] = style flags to set or 0 to reset text style
1517 *
1518 */
1519
1520void z_set_text_style (void)
1521{
1522 zword win = (h_version == V6) ? cwin : 0;
1523 zword style = zargs[0];
1524
1525 wp[win].style |= style;
1526
1527 if (style == 0)
1528 wp[win].style = 0;
1529
1530 refresh_text_style ();
1531
1532}/* z_set_text_style */
1533
1534/*
1535 * z_set_window, select the current window.
1536 *
1537 * zargs[0] = window to be selected (-3 is the current one)
1538 *
1539 */
1540
1541void z_set_window (void)
1542{
1543
1544 set_window (winarg0 ());
1545
1546}/* z_set_window */
1547
1548/*
1549 * pad_status_line
1550 *
1551 * Pad the status line with spaces up to the given position.
1552 *
1553 */
1554
1555static void pad_status_line (int column)
1556{
1557 int spaces;
1558
1559 flush_buffer ();
1560
1561 spaces = units_left () / os_char_width (' ') - column;
1562
1563 /* while (spaces--) */
1564 /* Justin Wesley's fix for narrow displays (Agenda PDA) */
1565 while (spaces-- > 0)
1566 screen_char (' ');
1567
1568}/* pad_status_line */
1569
1570/*
1571 * z_show_status, display the status line for V1 to V3 games.
1572 *
1573 * no zargs used
1574 *
1575 */
1576
1577void z_show_status (void)
1578{
1579 zword global0;
1580 zword global1;
1581 zword global2;
1582 zword addr;
1583
1584 bool brief = FALSE;
1585
1586 /* One V5 game (Wishbringer Solid Gold) contains this opcode by
1587 accident, so just return if the version number does not fit */
1588
1589 if (h_version >= V4)
1590 return;
1591
1592 /* Read all relevant global variables from the memory of the
1593 Z-machine into local variables */
1594
1595 addr = h_globals;
1596 LOW_WORD (addr, global0)
1597 addr += 2;
1598 LOW_WORD (addr, global1)
1599 addr += 2;
1600 LOW_WORD (addr, global2)
1601
1602 /* Frotz uses window 7 for the status line. Don't forget to select
1603 reverse and fixed width text style */
1604
1605 set_window (7);
1606
1607 print_char (ZC_NEW_STYLE);
1608 print_char (REVERSE_STYLE | FIXED_WIDTH_STYLE);
1609
1610 /* If the screen width is below 55 characters then we have to use
1611 the brief status line format */
1612
1613 if (h_screen_cols < 55)
1614 brief = TRUE;
1615
1616 /* Print the object description for the global variable 0 */
1617
1618 print_char (' ');
1619 print_object (global0);
1620
1621 /* A header flag tells us whether we have to display the current
1622 time or the score/moves information */
1623
1624 if (h_config & CONFIG_TIME) { /* print hours and minutes */
1625
1626 zword hours = (global1 + 11) % 12 + 1;
1627
1628 pad_status_line (brief ? 15 : 20);
1629
1630 print_string ("Time: ");
1631
1632 if (hours < 10)
1633 print_char (' ');
1634 print_num (hours);
1635
1636 print_char (':');
1637
1638 if (global2 < 10)
1639 print_char ('0');
1640 print_num (global2);
1641
1642 print_char (' ');
1643
1644 print_char ((global1 >= 12) ? 'p' : 'a');
1645 print_char ('m');
1646
1647 } else { /* print score and moves */
1648
1649 pad_status_line (brief ? 15 : 30);
1650
1651 print_string (brief ? "S: " : "Score: ");
1652 print_num (global1);
1653
1654 pad_status_line (brief ? 8 : 14);
1655
1656 print_string (brief ? "M: " : "Moves: ");
1657 print_num (global2);
1658
1659 }
1660
1661 /* Pad the end of the status line with spaces */
1662
1663 pad_status_line (0);
1664
1665 /* Return to the lower window */
1666
1667 set_window (0);
1668
1669}/* z_show_status */
1670
1671/*
1672 * z_split_window, split the screen into an upper (1) and lower (0) window.
1673 *
1674 * zargs[0] = height of upper window in screen units (V6) or #lines
1675 *
1676 */
1677
1678void z_split_window (void)
1679{
1680
1681 split_window (zargs[0]);
1682
1683}/* z_split_window */
1684
1685/*
1686 * z_window_size, change the width and height of a window.
1687 *
1688 * zargs[0] = window (-3 is the current one)
1689 * zargs[1] = new height in screen units
1690 * zargs[2] = new width in screen units
1691 *
1692 */
1693
1694void z_window_size (void)
1695{
1696 zword win = winarg0 ();
1697
1698 flush_buffer ();
1699
1700 wp[win].y_size = zargs[1];
1701 wp[win].x_size = zargs[2];
1702
1703 /* Keep the cursor within the window */
1704
1705 if (wp[win].y_cursor > zargs[1] || wp[win].x_cursor > zargs[2])
1706 reset_cursor (win);
1707
1708}/* z_window_size */
1709
1710/*
1711 * z_window_style, set / clear / toggle window attributes.
1712 *
1713 * zargs[0] = window (-3 is the current one)
1714 * zargs[1] = window attribute flags
1715 * zargs[2] = operation to perform (optional, defaults to 0)
1716 *
1717 */
1718
1719void z_window_style (void)
1720{
1721 zword win = winarg0 ();
1722 zword flags = zargs[1];
1723
1724 flush_buffer ();
1725
1726 /* Supply default arguments */
1727
1728 if (zargc < 3)
1729 zargs[2] = 0;
1730
1731 /* Set window style */
1732
1733 switch (zargs[2]) {
1734 case 0: wp[win].attribute = flags; break;
1735 case 1: wp[win].attribute |= flags; break;
1736 case 2: wp[win].attribute &= ~flags; break;
1737 case 3: wp[win].attribute ^= flags; break;
1738 }
1739
1740 if (cwin == win)
1741 update_attributes ();
1742
1743}/* z_window_style */